Proceedings ArticleDOI
Comparing the ‘Big 4’ - A User's View on GNSS Performance
Oliver Montenbruck,Peter Steigenberger,André Hauschild +2 more
- pp 407-418
TLDR
The determination and prediction of GNSS satellite orbits and clocks from measurements of global receiver networks, which forms the basis for precise point positioning applications, are discussed and the significance of satellite metadata knowledge is highlighted.Abstract:
With BeiDou-3 and Galileo complementing the legacy systems GPS and GLONASS, a total of four global navigation satellite systems (GNSS) has now become available that offer free and ubiquitous access to accurate positioning, navigation, and timing (PNT). Following an overview of the system status and capabilities, we compare the Big 4 GNSSs in terms of signal and clock characteristics. The signal-in-space range error (SISRE) are assessed and related to the achievable single-point positioning accuracy. Furthermore, service stability and availability aspects are adressed. With respect to geodetic users, we discuss the determination and prediction of GNSS satellite orbits and clocks from measurements of global receiver networks, which forms the basis for precise point positioning applications. Within the International GNSS Service (IGS) various analysis centers independently provide such products based on data of the IGS multi-GNSS network. The challenges in generating precise orbit and clock solutions for the individual constellations are discussed, and the significance of satellite metadata knowledge is highlighted.read more
Citations
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Journal ArticleDOI
Featured services and performance of BDS-3
TL;DR: The results show that the inter-satellite link (ISL) contributes a lot to the accuracy improvement of orbit determination and time synchronization for the whole constellation.
Principle and performance of BDSBAS and PPP-B2b of BDS-3
Journal ArticleDOI
Past, present and future of atomic clocks for GNSS
TL;DR: In this article, the authors discuss how far and in what directions, atomic clock technology should be pushed to provide maximum benefits to GNSS performance, reliability and cost, and provide a baseline by reviewing current GNSS satellite atomic clock technologies.
Journal ArticleDOI
Multi-GNSS Combined Orbit and Clock Solutions at iGMAS
TL;DR: In this paper , a combination method of iGMAS orbit and clock products is described, and the performance of the combined solutions is evaluated by various means, which indicates that consistent weights should be assigned for individual constellations and analysis centers included in the combination.
Performance Evaluation of the Early CNAV Navigation Message
TL;DR: In this article, a signal-in-space range error (SISRE) of about 1.1 m is obtained for the CNAV message whereas it is 0.6 m for the legacy navigation message (LNAV).
References
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Performance Evaluation of the Early CNAV Navigation Message
TL;DR: In this article, a signal-in-space range error (SISRE) of about 1.1 m is obtained for the CNAV message whereas it is 0.6 m for the legacy navigation message (LNAV).
Journal ArticleDOI
MBOC and BOC(1,1) Performance Comparison
N. Hoult,L. E. Aguado,P. Xia +2 more
TL;DR: In this article, the authors compared the performance of the MBOC (Multiplexed Binary Offset Carrier (MBOC) spectrum with the original BOC(1,1) spectrum and showed that MBOC offers significant advantages in multipath and tracking performance.
Journal ArticleDOI
Further observations of GPS satellite oscillator anomalies mimicking ionospheric phase scintillation
C. J. Benton,Cathryn N. Mitchell +1 more
TL;DR: In this paper, it was shown that the signal from the Navstar 43 Global Positioning System (GPS) satellite contained phase anomalies in such a way as to mimic ionospheric scintillation.
Book ChapterDOI
The Assessment of GNSS Measurements from Android Smartphones
TL;DR: It can be approved that under good observing conditions, the mean Carrier-to-noise Ratio (CNR) of the satellite signal received by smart mobile devices with Android operating system can usually reach above 25 dBHz and the quality of measurements needs to be improved.
Journal ArticleDOI
GPS satellite oscillator faults mimicking ionospheric phase scintillation
C. J. Benton,Cathryn N. Mitchell +1 more
TL;DR: In this article, a case study of an event on 17 May, 2011 is presented, where the L1 signal from the Navstar 43 satellite (pseudo-random number 13) contained pulses of rapid phase variation, in such a manner as to cause a large rise in the sigma-phi scintillation metric.
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